<!doctype html> 
<html> 
<head> 
    <meta charset="utf-8"> 
    <title></title> 
</head>
<body>
<div id='div1'></div>
<script type="text/javascript">
	


	div1.style.background = 'pink';
	div1.style.cssText = 'width:200px;height:100px';

	/*
	var a = [1,2,3];
	var b = [a];
	a = null;
	*/
	//
</script>
</body>
</html>